<?php

namespace app\api\controller;

use addons\epay\controller\Api;

class Pay extends Api
{
    protected $url = "https://api.mch.weixin.qq.com/pay/unifiedorder";//支付接口
    protected $appid = 'wx3216a1dfd52d5f00';//小程序ID
    protected $mch_id = '1707150558';//商户id
    protected $key = '6a24392800a887d64469c41b0b56e410';//商户平台密钥
    protected $noNeedLogin = ['*'];
    protected $noNeedRight = ['*'];
    public function pay($order_no, $price, $user_id)
    {
            $openid = \think\Db::name('user')->where('id', $user_id)->value('openid');
            $total_fee=$price*100;
            $params = array(
                'appid' => $this->appid,   //小程序ID
                'mch_id' => $this->mch_id,   //商户号
                'nonce_str' => $this->createNoncestr(),   //随机字符串
                'body' => "商品支付",   //商品描述
                'out_trade_no' => $order_no,   //商户订单号
                'total_fee' => $total_fee,   //总金额 单位 分
                'spbill_create_ip' => $_SERVER['REMOTE_ADDR'],   //终端IP
                'time_start' => date('YmdHis'),   //交易开始时间
                'notify_url' => "https://guangjianyuan.hkdqy.top/index.php/api/notify/notify",   //通知地址
                'openid' => $openid,   //用户openid
                'trade_type' => 'JSAPI'   //交易类型
            );

        $params['sign'] = $this->getSign($params);   //下单签名
        $xmlData = $this->arrayToXml($params);
        $return = $this->xmlToArray($this->postXmlSSLCurl($xmlData, $this->url, 60));
        if ($return && $return['return_code'] == 'SUCCESS' && $return['result_code'] == 'SUCCESS') {
            $pay_params = array(
                'appId' => $this->appid,
                'timeStamp' => time() . '',//时间戳
                'nonceStr' => $this->createNoncestr(),//随机串
                'package' => 'prepay_id=' . $return['prepay_id'],//数据包
                'signType' => 'MD5',//签名方式
            );
            $pay_params['paySign'] = $this->getSign($pay_params);
            return array('code' => 200, 'data' => $pay_params);
        } else {
            return array('code' => 500, 'info' => $return['return_code'] . ':' . $return['return_msg']);
        }
    }

    //作用：产生随机字符串，不长于32位
    private function createNoncestr($length = 32)
    {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    //作用：生成签名
    private function getSign($Obj)
    {
        foreach ($Obj as $k => $v) {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //签名步骤二：在string后加入KEY
        $String = $String . "&key=" . $this->key;
        //签名步骤三：MD5加密
        $String = md5($String);
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        return $result_;
    }

    //作用：格式化参数，签名过程需要使用
    private function formatBizQueryParaMap($paraMap, $urlencode)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if ($urlencode) {
                $v = urlencode($v);
            }
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar = '';
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }

    function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }

    function xmlToArray($xml)
    {
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }

    function postXmlSSLCurl($xml, $url, $second = 30)
    {
        $ch = curl_init();
        //超时时间
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error" . "<br>";
            curl_close($ch);
            return false;
        }
    }
}